Block Steam Downloads

I was wondering if someone could help me block steam downloads for one of our interfaces. I still want to allow game play just not downloading on one of our LAN interfaces. I have attempted to block ports 27014-27050 but that doesn't seem to work. Any suggestions?

Where is your rule placed in relation to the others? Rules are processed top-down, so if you put that rule after the Allow All rule then it won't trigger.

I would activate the rule, clear the states (Diagnostics - States - Reset States), and then run a packet capture (Diagnostics - Packet Capture) while doing a Steam download test to see what traffic is actually passing through.

That seemed to work generally though I have just been watching and checking the States Table to see how despite the rules and limiters the son's PC consumes 99% of the bandwidth. Modification of the Rule to match a targeted Steam IP ~ 103.2.118.3 ~ failed to have an impact. Resetting the States and hoping to see a slump, nothing. [Mind limiter is set to 2Mb IN]

Rule images attached…..names explanatory. That is a targeted one.

Perhaps I am NOT seeing the forest because of the trees and missing something silly?

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